For “men seeking absolute power,” as Spock puts it, this rule of law must be denied. Therefore the reason that “absolute power corrupts absolutely” is that it arrogates power to a creature that is beyond its inherent nature as creature and distinct from and beholden to a creator. It makes a man into a god.

Thus, writes Bonhoeffer,

People and especially youth will feel the need to give a leader authority over them as long as they do not feel themselves to be mature, strong, responsible enough to themselves fulfill the demands placed in this authority. The leader will have to be responsibly aware of this clear restriction of his authority. If the leader understands his function differently from that thus established, if the leader does not repeatedly provide the led with clear details on the limited nature of the task and on their own responsibility, if the leader tries to become the idol the led are looking for–something the led always hope from their leader–then the image of the leader shifts to one of a misleader, then the leader is acting improperly both toward the led as well as toward himself.

The leader’s function must be balanced, Bonhoeffer continues, with the other orders of the world: “The leader must lead the led into responsibility toward the social structures of life, toward father, teacher, judge, state. The leader must radically reject the temptation to become an idol, that is, the ultimate authority of the led.”

This is, as Bonhoeffer notes, the perennial temptation of those with political power, and it follows from the basic fallenness of humanity. Spock says rightly, “Your whole earth history is made up of men seeking absolute power.” We are, as fallen creatures, constantly creating idols, out of ourselves and our surroundings. As Bones McCoy puts it, when “a man holds that much power, even with the best intentions, [he] just can’t resist the urge to play God.”

It is comforting, I think, that Lord Acton’s wisdom survives into the 23rd century: “Power tends to corrupt, and absolute power corrupts absolutely. Great men are almost always bad men.”